<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>砰砰的爱心</title>
    <style>
        *{
            margin: 0;
            padding: 0;
        }
        ul,ol{
            list-style: none;
        }
        body{
            height: 100vh;
            background: #000;
            display: flex;
            justify-content: center;
            align-items: center;
        }
        ul{
            height: 200px;
            display: flex;
        }
        li{
            width: 20px;
            height: 20px;
            border-radius: 10px;
            background: red;
            margin-right: 20px;
        }
        li:nth-child(1){
            background: red;
            animation: love1 4s 0s infinite;
        }
        li:nth-child(2){
            background: rgb(216, 183, 36);
            animation: love2 4s 0.2s infinite;
        }
        li:nth-child(3){
            background: rgb(117, 204, 36);
            animation: love3 4s 0.4s infinite;
            
        }
        li:nth-child(4){
            background: rgb(74, 207, 163);
            animation: love4 4s 0.6s infinite;

        }
        li:nth-child(5){
            background: rgb(22, 114, 219);
            animation: love5 4s 0.8s infinite;

        }
        li:nth-child(6){
            background: rgb(168, 29, 211);
            animation: love4 4s 1s infinite;

        }
        li:nth-child(7){
            background: rgb(223, 27, 157);
            animation: love3 4s 1.2s infinite;

        }
        li:nth-child(8){
            background: rgb(231, 185, 32);
            animation: love2 4s 1.4s infinite;

        }
        li:nth-child(9){
            background: rgb(121, 19, 216);
            animation: love1 4s 1.6s infinite;

        }
        @keyframes love1 {
            30%,50%{
                height: 60px;
                transform: translatey(-30px);
            }
            70%,100%{
                height: 0px;
                transform: translatey(0px);
            }
        }
        @keyframes love2 {
            30%,50%{
                height: 125px;
                transform: translatey(-60px);
            }
            70%,100%{
                height: 0px;
                transform: translatey(0px);
            }
        }
        @keyframes love3 {
            30%,50%{
                height: 160px;
                transform:translatey(-75px);
            }
            70%,100%{
                height: 0px;
                transform: translatey(0px);
            }
        }
        @keyframes love4 {
            30%,50%{
                height: 180px;
                transform: translatey(-60px);
            }
            70%,100%{
                height: 0px;
                transform: translatey(0px);
            }
        }
        @keyframes love5 {
            30%,50%{
                height: 200px;
                transform: translatey(-45px);
            }
            70%,100%{
                height: 0px;
                transform: translatey(0px);
            }
        }


    </style>
</head>
<body>
    <ul>
        <li></li>
        <li></li>
        <li></li>
        <li></li>
        <li></li>
        <li></li>
        <li></li>
        <li></li>
        <li></li>
    </ul>
</body>
</html>